What is the minimum number of features required for a Level 4 synchronized spin?

A Level 4 synchronized spin requires a minimum of four features to meet the criteria for this highest level of judging in synchro skating. The features typically include specific elements such as the type of spin, the number of revolutions, the position of the skaters, and the quality of the spin itself, among others. Having four distinct and well-executed features demonstrates advanced skills and artistry, which are necessary to achieve the maximum score for this element. This level of complexity ensures that the spin not only showcases technical proficiency but also contributes significantly to the overall performance quality of the synchronized skating routine.